Sure thing! We've got 811 and we're gonna multiply it by 35. That's the same as adding 811 to itself 35 times.
Step 1: 0 + 811 = 811
Step 2: 811 + 811 = 1622
Step 3: 1622 + 811 = 2433
Step 4: 2433 + 811 = 3244
Step 5: 3244 + 811 = 4055
Step 6: 4055 + 811 = 4866
Step 7: 4866 + 811 = 5677
Step 8: 5677 + 811 = 6488
Step 9: 6488 + 811 = 7299
Step 10: 7299 + 811 = 8110
Step 11: 8110 + 811 = 8921
Step 12: 8921 + 811 = 9732
Step 13: 9732 + 811 = 10543
Step 14: 10543 + 811 = 11354
Step 15: 11354 + 811 = 12165
Step 16: 12165 + 811 = 12976
Step 17: 12976 + 811 = 13787
Step 18: 13787 + 811 = 14598
Step 19: 14598 + 811 = 15409
Step 20: 15409 + 811 = 16220
Step 21: 16220 + 811 = 17031
Step 22: 17031 + 811 = 17842
Step 23: 17842 + 811 = 18653
Step 24: 18653 + 811 = 19464
Step 25: 19464 + 811 = 20275
Step 26: 20275 + 811 = 21086
Step 27: 21086 + 811 = 21897
Step 28: 21897 + 811 = 22708
Step 29: 22708 + 811 = 23519
Step 30: 23519 + 811 = 24330
Step 31: 24330 + 811 = 25141
Step 32: 25141 + 811 = 25952
Step 33: 25952 + 811 = 26763
Step 34: 26763 + 811 = 27574
Step 35: 27574 + 811 = 28385

So, 811*35 = 28385